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Surely what you need is an accelerometer, you know that the period is always the same, it just moves faster when first set in motion (I'm not totally sure that's correct, my knowledge of basic...

Richard,

Not if your application will not be required to tilt or has some mechanical (gimbals) way to negate the problem.

George

Hi Richard,

you need to add a 3-axis accelerometer to do tilt compensation, something like LSM303DLM.

George

So you are connecting the clock and data from the PIC directly to the break-out board pins? Do you have pull-ups? if so to 5 or 3.3?

george

Are you using one of the break-out boards, GY0281 or GY282? Could you post a circuit diagram? The two break-out boards above both have 3.3v regulators on them, I'm curious as to what Vcc you run the...

I can't edit my last post and I wanted to add

My understanding is that you want the gain as high as possible without saturating. X,Y and Z values are in the range -2048 to 2047 so I guess you're...

My understanding (perhaps wrong) is that 5983 is an improved version of 5883. It is temperature compensated and will output at a greater rate appearently. I'm working on the assumption that it is...

Andy, you still have North and East reversed and South and West reversed as well, North is 0, East is 90, South is 180 and West is 270.
http://commons.wikimedia.org/wiki/File:Compass_Card.png...

Not important at this point but you have East and North reversed.

I'm try to do the same thing with HMC5983, I can read data which seems reasonable ie very different and repeatable for the four...